Method and apparatus for forming an interiorly beaded or looped tearing-strip can



Mardl 1929. G. F. WALTER METHOD AND APPARATUS FOR FORMING AN INTERIORLY BEADED QR LOOPED TEARING STRIB CAN Filed Feb. 19, 1926 2 Sheets-Sheet l INVENTOR m 4 2M154 ad Mw March 19, 1929. e. F. WALTER 1,705,844

METHOD AND APPARATUS FOR FORMING AN INTERIORLY BEADED OR LOOPED TEARING STRIP CAN Filed Feb. 19, 1926 2 Sheets-Sheet 2 J? I I I in i it i I j! .37 Q lhll 42 40 NFL. u 37 INVENTOR ATT NEY Patented Mar. 19, 1929.

UNITED STATES I 1,705,844 PATENT OFFICE.

GEORGE FREDRICK WALTER, OF BROOKLYN, NEW YORK, ASSIGNOR TO AMERICAN CAN COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

METHOD AND APPARATUS FOR FORMING AN INTERIORLY BEADED 0R LOOPED TEARING-STRIP CAN.

Application filed February 19, 1926. Serial No. 89,486.;

My invention relates in general to a method and apparatus for forming an interiorly beaded or looped tearing strip can with a friction plug reclosure of the type and construction described, illustrated and claimed by John M. Young in his Patent 1,586,277, granted May 25, 1926. In this Young type of tearing strip container with friction plug reclosure a portion of the container wall, a short distance from thetop edge, is looped inwardly and upwardly to provide, after said loop or bead has been properly finished and sized, an interior friction walbseatto been: gaged by a corresponding interior friction head or plug formed on the inside of the container cover. Cans of this typehave sanitary can ends double seamed to their top and bottom flanges. They also have parallel encircling score lines, with auxiliary score lines between the parallel ones, setting off a tearing strip which terminates into a key engaging tongue, This tearing strip is located between the top double seam and the body bead or loop. When the tearing strip has been removed by means of an opening key the severed container cover with the friction plug element is free to form a reclosure for the container by means'of the frictional engagement between the interior can body bead or loop and the inwardly extending friction plug portion of the severed can cover.

A specific object of my invention .is the provision of a novel method and apparatus for forming said interior body bead or loop,

ing the formed bead or loop to true size or accurate diameter corresponding to the diameter of the friction plug.

The initial beading operation. of the can body being the same as already-described and 'co-pending appli-, 7 andv Serial No.

"and cross section through a collapsing mechillustrated in detail in m cations, Serial No. 893% will be laid upon the novel method and apparatus of collapsing and sizing the body bead or loop. It is most important in the manufacture of this type of container that the inner diameter of the inwardly bent looped portion which is later to form the friction wall seat be properly sized to correctly, tightly anduniformly engage the cover friction plug member when the latter is used as a reclosure after severance from the container by the removal of the tearing strip. This essential truing and sizing condition is easily accomplished by my method and by the mechanism which I have illustrated in the drawings. It should be understood that this mechanism represents only one form of m invention and I do not wish to limit myse f to. the preferred embodiment shown herein.

One of the objects of m invention resides in providing a very'simp e and inexpensive method for manufacturing the type of container referred to in a manner that lends itself to commercial high s eed production.

consisting of the least num er of operations compatible with'practical and efiicient manufacturing principles. 7

Another objectof my invention resides in the provision of a novel method and apparatus for rolling the collapsed bead of a cylindrical body to exact size.

Still another object of my invention resides in the provision of a simple method and apparatus for rollin a peripheral head in the cylindrical wall 0% a container body, in col lapsing said head by'endwise pressure and thereafter rerolling said collapsed head to exact size.

Numerous other objects and advantages of the invention will be apparent as it is better understoodfrom the following description, which, taken in'connection with the accompanying drawings, discloses a preferred embodiment thereof.

Referring now to the accompanying drawings which forms part of the specifications,

Fig. 1 is a perspective view, withparts broken away, of the type of container adapted to be formed according to my invention.

Fig. 2 is a longitudinal section through a portion of a heading device, this view illustrating a positioned container body being operated upon by the heading members Fig. 3. is a partial longitudinal elevation dicates a 'hollow container body of a cylindriw cal orother form, provided with the ordinary side seam 11, and circum-ferentially scored lines 12 setting oil a tearing strip 13,

. ter-sink 18, inwardly spaced from the inte 'rior wall of the container 10 whenthe'cover and further provided with directing score 'lines 14 arranged at an an le to the score.

member'17 is secured to the seam by the regular double seam 19. The container wall '10 is) inwardly pressed at to form an upwardly 'i and inwardly extending loop 21 connecting with a downwardly and outwardly extending loop 22, formed in the container wall adJa cent and beneath thetearing strip 13.' The inner diameter of the looped portion 21.is correctly sized to securely engage the outer" diameter of the counter-sink 18 after the tearing strip is removed and when the cover member 17 is used as a reclosure for the opened container 10.

In forming the particular elements described in this container and shown in Fig. 1, it is necessary to first form the container body 10 in the regular manner by properly shaping it to cylindrical or other form and engaging the edges of the blank in the regular side seam 11. This cylindrical or ot er formed body 10 is then pressed in a beading machine where the first operation of forming the looped construction is accom lished. The forming of the first operation or sad on ghe container part is clearly illustrated in The beading mechanism consists of an inner beading roller 23;rotatably mounted on a stud 24 eccentrically secured to the end of a v shaft 25', eccentrically journalled in a sleeve 26 rotatable within a shell 27. A hollow cup member 28 is threaded fixedly to the shell 27 and extends beyond the end of the same as -clearly illustrated in Fig. 2. In the annular opening formed in the outer part of the shell there is disposed a ring 29 secured to the cup member 28 by means of screws 30, passin through a hardened steel washer 31 overlying the end of the sleeve 26 and spaced therefrom, The ring 29 is formed with an inwardly extended annular ridge 32 adapted to cooperate at certain periods with an annular groove 33 formed in the roller 23, as clearly illustrated in Fig. 2.

The fornied cylindrical container body 10 is inserted within the heading device by being ositioned with its inner end against the was er 31, it being understood that the sleeve 26 and the shaft 25 are moved relative to oneanother, in order, by reason of the eccentricity of each of those members, to position the roller 23 centrally of the ring 29 and away forces the material of the container wall iameter of the container against the annular rid e 32 of the ringl 29.. i to and causes that art of t e container wa conform to the s ape of the ridge 32 and the v groove 33. 'While the sleeve 26 and the shaft 25 are then held in fixed position the shell 27 carrying the on member 28 and the ring 29 is then rotated, w ich action causes the ridge 32 to contact' the entire circumference of the 1 7 container body 10 in a circular path of travel, and this action by reason of the cooperation of the roller 23 which works upon the stud 24 forms an inwardly pressed bead 35 into the upper wall of the container body 10 adjacent the tearing strip 13.

After the groove 35 tirely around the container body 10 the sleeve 26 and the shaft 25 are moved to cause the roller 23 to move inwardly from its position adjacent the ring 29 and thus to free the osition the roller 23 eny 10 and th'e'groove 33 of the said roller I Y has been formed ensaid container body 10. The formed'and i now beaded container body is then removed from the heading machine.

After this first or simple beading operation the formed and partially beade containerbody 1() is then transferred to a, collapsing and sizing or truing mechanism, illustrated in.

Fi s. 3 and 4.

eferring now to Fig. 3 wherethe second or collapsing operation is shown, the can bod is positioned upon a bed plate or base 36 whic 1 is a part of an organized apparatus, some of the common parts of which are not part of this invention and need not be shown. The

collapsing device is then lowered over the top of the said body 10. This collapsing device consists of a hollow shell'housing37.

Tightly but mo'vably fitting within said shell' housing 37 is a collapsing die or plunger member 38 fixedly secured to a plunger shaft or rod 39. The collapsing die plunger 38 is divided into two portions of varying diameter, the upper-part 40 being of a diameter corresponding to the inside diameter of the shell housing 38 and snugly fitting the inner walls of the same and the lower part 11 of a.

diameter less than the inside diameter of the shell housing 38 and also less than the inside diameter of the can body top 10, the difference between the two diameters being just abolilit e ual to the thickness of the can body wa die shoulder 42, against which the upper edge of the can body wall abuts and whereby said can bod edge is stopped. When the container bo y- 10 is positionedas illushe dividing line between the two parts of the plunger die 38is formed by the trated in Fig. 3, the plunger shaft 39 carrying the collapsing die 38 is moved downwardly towards the bed plate 36 and this action collapses thebead shown in F 1g. 2 to the looped form 43 shown in Fig. 3, that is to say, the ressure exerted upon the uppermargin of t ie can body 10 by the shoulder part 42 of the collapsing die 38 presses that-can body wall portion which lies between the shoulder 42 and the head 35 downward until the bead assumes the looped form 43 shown in Fig. 3. While the bead 35 is thus collapsed the hollow shell member 87, whose inner (ll-",- ameter is of just sufficient size to snugly fit around the outer upper wall part of the container 1(),*acts as an outer ring pad or supporting annular mandrel and helps to keep the upper part of the can body, which has to stand the brunt of the pressure of the col-- lapsing die, from being bent out of its original shape.

Diverting our attention now F ig 4it will be noted that this figure illustrates a mechanism for shaping the collapsed bead or loop 43 to final form and for truing or sizing the inner diameter of the bead or loop to esactiy cor-1 respond with the diameter of the friction plug member 18 of the container-cover. I This' final z shaping and sizing is accomplished by a roller mechanism indentical in construction and op eration with the initial beading mechanism disclosed in Fig. 2. This final shaping and sizing mechanism consists of a beading and sizing'roller 44rotatably mounted on a stud shaft 45, which is eccentrically secured to the end of a shaft 46, which in turn is eccentrically journalled in asleeve 47 rotatable within a shell I 48. A hollow cup member 49 is fixedly threaded to the shell 48 and extends beyond the end of the same as clearly illustrated in Fig. 4. In

the annular opening or recess formed in the outer cup part of the shell there isdisposed a. ring 50 secured to the cup member 49'byn1eans of screws 51, one of which is shown in Fig. 4. These screws 51 pass through a hardened steel washer 52 positioned between the bottom of the cup part of the shell 49 and the ring member 50 and said washer having its annular inner margin projecting. over the shoulder of the cup member 49. The inner wall of-the ring member 50 is perfectly straight and smooth for the .purpose of a providing a straight and smooth annular supporting contact for the outer side of the can body wall around the beaded part of the upper can body wall.

The partially looped cylindrical container body 10 is inserted within this final shaping and sizing device with its inner end or upper edge resting against and being stopped by the washer 52, it being understood that the sleeve 47 and the shaft 46 are moved relative to one another, in order, by reason of the eccentricity of each of those members, to position the roller 44 centrally of the ring 50 and away from the inner wall of the ring 50.

After the container body 10 has thus been pot sitioned the shaft 46 an he sleeve 47 are both slightly rotated to force the roller 44 toward head 55. While the sleeve 47 and the shaft 46 is then heldin fixed position the shell 48 carrying the cup member 49 and the ring 50 is then rotated, which action causes'the groove 54 to contact the entire circumference of the container body 10 and the bead 43in a circular path of travel. and this action by reason of the cooperation ofthe roller 44 which works upon theistud 45*completes the 'fin'ished bead 55 over its entirei'circumferencex At the same time said grooved part 54 owing to its accu rately dimensioned annular-concavity acts as the sizing medium and brings the finishedbead to accurately sized diameter corres 0nding'exactl with the diameter ofthe friction plug mem er 18 of the container cover.

After the finished bead or loop 55 has been formed and accurately sized entirely around the inner container body 10 thesleeve 47 and the shaft 46 are further rotated to cause the roller 44 to move towards the longitudinal axis of the annularring member 50 and thus liberate the said container body 10. The completely beaded and sized .the parts without departing from thespirit and scope of the invention, or sacrificing all of-its material advantages, the form hereinbefore described being merely 'a preferred embodiment thereof.

I claim:

1. The method of forming a sized looped wall ortion in a cylindrical body coin rising orming inwardly the peripheral cad in the cylindrical wallof the body, collapsin the bead, and thereafter. rolling the collapsed bead to accurate circumferential dimension.

2. The method described, comprising rolling a peripheral inwardly extending bead in the cy indrical wall of a container body, collapsing the beadand re-rolling the Bead to exact size.

3. The method described, comprising form ing inwardly a peripheral head in the cylindrical wall of a body, collapsing the bend to .eon'tainer body is then removed from the finishing and sizingform a looped wall portion, and thereafter subjecting the collapsed bead throughout its circumference to the rolling action of a die to size said bead.

4. In an apparatus of the class described, the combination of a support for one end of a tubular body, a collapsing head for the other end comprising a shell adapted to concentrically surround a portion of said tubular body near'the peripheral bead formed therein, a plunger in said shell, said plunger having means formin an annular seat for the reception of the end of the tubular body and having a concentrically situated portion adapted to lie wholly Within the upper end of said tubular body to brace it and means for moving said plunger toward said support and through said shell to exert end pressure on said tubular body to collapse the peripheral bead formed therein.

5. In an apparatus of the class described, the combination of a support for one end of a tubular body, a collapsing head for the other end, comprising a shell sufiiciently deep to snugly receive a relatively wide portion of the end wall of a tubular body formed with a peripheral bead therein, a plunger in said shell and having two dimensions whereb to form an intermediate shoulder adapted to receive the end of the tubular body there against, with the portion of the plunger of smaller diameter lying snu ly within and supporting, the inner wall 0 the end of the tubular body, and means for shiftin said plunger through said shell and towards said support to press upon the end of the tubular body wall and to collapse the bead thereof.

6. In a device of the class described, the combination of an annular die having a smooth inner surface and adapted to receive the cylindrical wall of a container body having an inwardly projecting bead therein, a'

die roll operatively positioned adjacent said annular die, and provided With a peripheral groove of predetermined cross section, and means for shifting said roll relatively to said annular die to permit the positioning of a tubular body between said annular die and roll and means for causing relatively rolling movement between said roll and die to roll said bead.

7. In a device of the class described, the combination of an annular member adapted to receiveone end of a tubular member, a roll associated therewith, means for shifting said roll relatively to said annular die and means for causing relative rolling movement between said die and roll, said die and roll having cooperative die faces, one of which is smooth and the roll having a peripheral groove of predetermined cross section.

8. In a device of the class described, the eombinationof a support, an annular die thereon, and provided with a smooth inner wall forming a die surface, a sleeve carried by said annular die, and a shaft eccentrically mounted in said sleeve, a roller mounted on said shaft within said annular die so as to shift relatively thereto onrotation of said sleeve, said roll having aperipheral die groove therein, a stop member carried by said annular die to position the end of a tubular body having aperipheral bead inwardly projecting from the wall thereof, and means for causing relatively rolling movement between said roll and die to shape said bead.

GEORGE FREDRICK WALTER. 

